Add modelService test. Thin for now but will be expanded upon.

syweb/webclient/test/unit/model-service.spec.js

+describe('ModelService', function() {
+
+    // setup the dependencies
+    beforeEach(function() {
+        // dependencies
+        module('matrixService');
+        
+        // tested service
+        module('modelService');
+    });
+
+    it('should be able to get a member in a room', inject(
+    function(modelService) {
+        var roomId = "!wefiohwefuiow:matrix.org";
+        var userId = "@bob:matrix.org";
+        
+        modelService.getRoom(roomId).current_room_state.storeStateEvent({
+            type: "m.room.member",
+            id: "fwefw:matrix.org",
+            user_id: userId,
+            state_key: userId,
+            content: {
+                membership: "join"
+            }
+        });
+        
+        var user = modelService.getMember(roomId, userId);
+        expect(user.state_key).toEqual(userId);
+    }));
+});